Todd Gamblin 6e2625ae65 package_base: generify accessor methods for when-keyed dictionaries ... This turns some variant-specific methods for dealing with when-keyed dictionaries into more generic versions, in preparation for conditional version definitions. `_by_name`, `_names`, etc. are replaced with generic methods for transforming when-keyed dictionaries: * `_by_subkey()` * `_subkeys()` * `_num_definitions()` * `_definitions()` * `_remove_overridden_defs()` And the variant accessors are refactored to use these methods underneath. To do this, types like `WhenDict` had to be generified, and some `TypeVars` were added for sortable keys and values. Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>		2024-12-17 07:25:14 -08:00
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spack	package_base: generify accessor methods for when-keyed dictionaries	2024-12-17 07:25:14 -08:00